The site of Bol'shoy Yakor' I is one of the most intensively investigated Late Pleistocene sites in Eastern Siberia. This volume compiles and presents the outcome of more than three decades of research by the authors in English for the first time. The site, discussed in the context of the landscape that surrounds it and the wider archaeology of the region, is considered as a palimpsest of activity, built up through repeated episodes of activity. Through a detailed study of the techniques of lithic production and animal exploitation, these activities are refitted into the seasonal cycles of the prehistoric hunter-gatherers who performed them. This book represents a valuable source for regional experts, technical specialists, and students with an interest in the Upper Palaeolithic of Northern Eurasia.